distgit/pagure: indicate to pagure that the git hook have a read-only access to the DB

This way it'll try to interact with the DB using async processes
(the workers) rather than trying to do it where it does not have
the permissions and crash.

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

roles/distgit/pagure/templates/pagure_shared.cfg

@@ -54,6 +54,7 @@ DEPLOY_KEY = False
 LOCAL_SSH_KEY = False
 ALLOW_DELETE_BRANCH = False
 EMAIL_ON_WATCHCOMMITS = False
+GIT_HOOK_DB_RO = True
 LOG_ALL_COMMITS = True
 
 DISABLED_PLUGINS = ['IRC', 'Pagure tickets', 'Read the Doc', 'Fedmsg']